甘肃黑山铜镍多金属矿床“三位一体”勘查预测模型建立及应用示范  

The“Trinity”prospecting prediction geological model and application demonstration of Heishan nickel-copper polymetallic deposit in Gansu Province

作　　者：俞军真 李德贤 王坚 陈鑫[3] 史国梅 王伟德 赵宏斌 代兵 樊鑫 YU Junzhen;LI Dexian;WANG Jian;CHEN Xin;SHI Guomei;WANG Weide;ZHAO Hongbin;DAI Bing;FAN Xin(State Key Laboratory of Ni&Co Associated Minerals Resources Development and Comprehensive Utilization,Jinchang 737100,Gansu,China;Jinchuan Nickel&Cobalt Research and Engineering Institute,Jinchang 737100,Gansu,China;School of Resources,China University of Geosciences,Wuhan 430074,Hubei,China)

机构地区：[1]镍钴共伴生资源开发与综合利用全国重点实验室,甘肃金昌737100 [2]金川镍钴研究设计院,甘肃金昌737100 [3]中国地质大学(武汉)资源学院,湖北武汉430074

出　　处：《矿产勘查》2025年第1期155-165,共11页Mineral Exploration

基　　金：国家自然科学基金项目(No.42164007);国家重点研发计划(2023YFF0804402);镍钴共伴生资源开发与综合利用全国重点实验室项目(No.JKDGNZ26Z202406)联合资助。

摘　　要：黑山铜镍多金属矿床是截止目前在甘肃北山地区发现的唯一一个与基性—超基性岩浆作用有关具有规模的中型硫化铜镍多金属矿床。本文全面整理和研究分析矿床地质特征,构筑了成矿地质体、成矿结构面、成矿作用标志“三位一体”勘查预测信息模型,指导矿床深部找矿预测及勘查工作。结果显示成矿地质体主要为晚泥盆世辉长岩相和橄榄岩相铁质基性—超基性杂岩体,矿体主要分布在橄榄岩相斜长方辉橄榄岩和斜长二辉橄榄岩。成矿构造主要为橄榄岩相带构造和岩体与围岩接触带构造,成矿结构面主要为原始结晶分异结构面,矿体主要分布在岩体深边部产状由陡变缓处和岩体与围岩接触带上盘,矿石类型主要为浸染状、稠密浸染状和半海绵陨铁状贫矿石;蚀变类型主要为蛇纹石化和绿泥石化蚀变。勘查预测模型显示预测成矿中心和验证靶区在矿区中段300 m以下,经钻探工程验证实现找矿增储突破,探获镍金属量规模达中型。找矿突破使黑山矿床成为甘肃北山地区现今发现的最大的硫化铜镍多金属矿床,并为矿区深部及外围铜镍矿床(点)的勘查工作提供示范和指导。The Heishan copper-nickel polymetallic deposit is the only medium copper-nickel sulfide polyme⁃tallic deposit related to basic-ultrabasic magmatism found in Beishan area of Gansu Province up to now.In this pa⁃per,we comprehensively sorted out and studied the characteristics of deposit,constructed a“Trinity”comprehen⁃sive prospecting and prediction geological model of ore-forming geological body,ore-forming structural plane,ore-forming markers and carried out the prediction and exploration work of deep deposit.The results show that the ore-forming geological bodies are mainly Late Devonian gabbro facies and peridotite facies ferruginous basic-ultrabasic complex,and the ore bodies are mainly distributed in peridotite facies plagiozonite pyroxene and plagiozonite dipy⁃roxene peridotite.The metallogenic structures are mainly peridotite facies zone structure and rock mass and sur⁃rounding rock contact zone structure,the metallogenic structural plane is the original crystal differentiation struc⁃tural plane,and the main ore body is mainly distributed in the deep edge of the rock mass and the contact zone be⁃tween the rock mass and the surrounding rock.The ore types are mainly disseminated,dense disseminated and semi-spongy iron lean ores.The main types of alteration are serpentinization and chlorite alteration.The exploration prediction model shows that the mineralization center is less than 300 meters in the middle section of the mining area,and the drilling engineering verification has achieved a breakthrough in prospecting and storage,and the scale of nickel metal has reached medium,which makes the Heishan deposit the largest copper-nickel sulfide polymetal⁃lic deposit found in Beishan area of Gansu Province,and provides a demonstration and guidance for copper-nickel prospecting and exploration in this area.

关 键 词：黑山铜镍多金属矿床 三位一体 勘查预测模型 成矿地质体 成矿构造 成矿结构面 成矿作用特征标志 

分 类 号：P624[天文地球—地质矿产勘探]